/* Released under the BSD 2-Clause License
 *
 * Copyright © 2018-present, terrestris GmbH & Co. KG and GeoStyler contributors
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * * Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

import * as React from 'react';

import './ColorsPreview.less';

import RuleGeneratorUtil from '../../../Util/RuleGeneratorUtil';

const _isEqual = require('lodash/isEqual');

// non default props
export interface ColorsPreviewProps {
  /** List of colors to preview */
  colors: string[];
}

/**
 *
 */
export class ColorsPreview extends React.Component<ColorsPreviewProps> {

  public shouldComponentUpdate(nextProps: ColorsPreviewProps): boolean {
    return !_isEqual(this.props, nextProps);
  }

  static componentName: string = 'ColorsPreview';

  render() {
    const {
      colors
    } = this.props;

    const style = RuleGeneratorUtil.generateBackgroundStyleFromColors(colors);

    return (
      <div
        className="colors-preview"
        style={style}
      />
    );
  }
}

export default ColorsPreview;
